<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="课程标题" prop="title">
        <el-input
          v-model="queryParams.title"
          placeholder="请输入课程标题"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="课程状态" prop="status">
        <el-select v-model="queryParams.status" placeholder="请选择课程状态 Draft未发布  Normal已发布" clearable>
          <el-option
            v-for="dict in dict.type.edu_course_status"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['edu:course:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['edu:course:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['edu:course:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['edu:course:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="courseList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <!-- <el-table-column label="课程ID" align="center" prop="id" v-if="true"/> -->
      <el-table-column label="课程标题" align="center" prop="title" :show-overflow-tooltip="true">
        <template slot-scope="scope">
          <router-link :to="'/edu/chapter/index/'+ scope.row.id " class="link-type" >
            <span>{{ scope.row.title }}</span>
          </router-link>
        </template>

      </el-table-column>
      <el-table-column label="课程专业父级" align="center" prop="titleSP" />
      <el-table-column label="课程专业" align="center" prop="titleS" />
      <el-table-column label="课程讲师" align="center" prop="name" />
      <el-table-column label="课程简介" align="center" prop="description" :show-overflow-tooltip="true"></el-table-column>
      <el-table-column label="课程销售价格" align="center" prop="price" />
      <el-table-column label="总课时" align="center" prop="lessonNum" />
      <el-table-column label="课程封面" align="center" prop="cover" width="100">
        <template slot-scope="scope">
          <image-preview :src="scope.row.url" :width="50" :height="50"/>
        </template>
      </el-table-column>
      <el-table-column label="销售数量" align="center" prop="buyCount" />
      <el-table-column label="课程状态" align="center" prop="status">
        <template slot-scope="scope">
          <dict-tag :options="dict.type.edu_course_status" :value="scope.row.status"/>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['edu:course:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['edu:course:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改课程对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body @open="clear">
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="课程标题" prop="title">
          <el-input v-model="form.title" placeholder="请输入课程标题" />
        </el-form-item>
        <!-- <el-form-item label="课程简介" prop="description">
          <el-input v-model="form.description" placeholder="请输入课程简介" />
        </el-form-item> -->
        <el-form-item label="课程专业父级" prop="subjectParentId">
          <el-select v-model="form.subjectParentId" placeholder="请输入课程名称" @change="selectsubjectParentId">
            <el-option
              v-for="fr in subjectList"
              :key="fr.id"
              :value="fr.id"
              :label="fr.title"
            ></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="课程专业" prop="subjectId">
          <el-select v-model="form.subjectId" placeholder="请输入课程名称">
            <el-option
              v-for="fr in childrenList"
              :key="fr.id"
              :value="fr.id"
              :label="fr.title"
            ></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="讲师" prop="name">
          <el-select v-model="form.name" placeholder="请输入课程名称" @change="selectteacherId">
            <el-option
              v-for="fr in teacherList"
              :key="fr.id"
              :value="fr.id"
              :label="fr.name"
            ></el-option>
          </el-select>
        </el-form-item>
        <el-form-item label="课程简介" prop="description">
          <el-input v-model="form.description" type="textarea" placeholder="请输入内容" />
        </el-form-item>
        <el-form-item label="课程销售价格" prop="price">
          <el-input-number v-model="form.price" :min="0" controls-position="right"/>
        </el-form-item>
        <!-- <el-form-item label="课程销售价格" prop="price">
          <el-input v-model="form.price" placeholder="请输入课程销售价格，设置为0则可免费观看" />
        </el-form-item> -->
        <el-form-item label="总课时" prop="lessonNum">
          <el-input-number v-model="form.lessonNum" :min="0" controls-position="right"/>
        </el-form-item>
        <!-- <el-form-item label="总课时" prop="lessonNum">
          <el-input v-model="form.lessonNum" placeholder="请输入总课时" />
        </el-form-item> -->
        <el-form-item label="课程封面">
          <image-upload v-model="form.cover"/>

        </el-form-item>
        <el-form-item label="销售数量" prop="buyCount">
          <el-input-number v-model="form.buyCount" :min="0" controls-position="right"/>
        </el-form-item>
        <!-- <el-form-item label="销售数量" prop="buyCount">
          <el-input v-model="form.buyCount" placeholder="请输入销售数量" />
        </el-form-item> -->
        <el-form-item label="课程状态" prop="status">
          <el-select v-model="form.status" placeholder="请选择课程状态 Draft未发布  Normal已发布">
            <el-option
              v-for="dict in dict.type.edu_course_status"
              :key="dict.value"
              :label="dict.label"
              :value="dict.value"
            ></el-option>
          </el-select>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button :loading="buttonLoading" type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listCourse, getCourse, delCourse, addCourse, updateCourse } from "@/api/edu/course";
import { listTeacher, getTeacher, delTeacher, addTeacher, updateTeacher } from "@/api/edu/teacher";
import { listSubject, getSubjectChildren,getSubject, delSubject, addSubject, updateSubject } from "@/api/edu/subject";
import { listCourseDescription, getCourseDescription, delCourseDescription, addCourseDescription, updateCourseDescription } from "@/api/edu/courseDescription";
import {listCollection, listCollection1} from "@/api/edu/collection"


export default {
  name: "Course",
  dicts: ['edu_course_status'],
  data() {
    return {
      // 按钮loading
      buttonLoading: false,
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 课程表格数据
      courseList: [],
      //讲师表格数据
      teacherList:[],
      courseDescriptionList:[],
      //课程专业父类
      subjectList:[

      ],
      childrenList:[],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        teacherId: undefined,
        subjectId: undefined,
        subjectParentId: undefined,
        title: undefined,
        status: undefined,
        memberId:undefined,
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        id: [
          { required: true, message: "课程ID不能为空", trigger: "blur" }
        ],
        teacherId: [
          { required: true, message: "课程讲师ID不能为空", trigger: "change" }
        ],
        subjectId: [
          { required: true, message: "课程专业ID不能为空", trigger: "change" }
        ],
        subjectParentId: [
          { required: true, message: "课程专业父级ID不能为空", trigger: "change" }
        ],
        title: [
          { required: true, message: "课程标题不能为空", trigger: "blur" }
        ],
        price: [
          { required: true, message: "课程销售价格，设置为0则可免费观看不能为空", trigger: "blur" }
        ],
        lessonNum: [
          { required: true, message: "总课时不能为空", trigger: "blur" }
        ],
        cover: [
          { required: true, message: "课程封面图片路径不能为空", trigger: "blur" }
        ],
        buyCount: [
          { required: true, message: "销售数量不能为空", trigger: "blur" }
        ],
        status: [
          { required: true, message: "课程状态 Draft未发布  Normal已发布不能为空", trigger: "change" }
        ],
      }
    };
  },
  created() {
    const memberId = this.$route.params && this.$route.params.memberId;
    this.queryParams.memberId=memberId;
    this.getList();
    console.log(memberId)
    this.listSubject();

  },
  methods: {
    clear(){

    },
    //讲师列表
    selectteacherId(value){
      this.form.teacherId=value

    },
    //课程专业父类
    selectsubjectParentId(value){

      this.form.subjectId=undefined

      getSubjectChildren(value).then(response => {


        this.childrenList=response.data

      });



    },

    /** 查询课程列表 */
    getList() {
      this.loading = true;
      listCollection(this.queryParams).then(response => {

        console.log(response)
        this.courseList = response.rows;
        this.total=response.total
        this.loading = false;

      });







      //讲师查询
      listTeacher(this.queryParams).then(response => {
        this.teacherList = response.rows;

      });
      listCourseDescription(this.queryParams).then(response => {
        this.courseDescriptionList = response.rows;

        this.loading = false;
      });
      //课程专业父级

    },
    listSubject() {
      listSubject().then(response => {
        this.subjectList = this.handleTree(response.data, "id", "parentId");

        this.loading = false;


      })
    },

    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        id: undefined,
        teacherId: undefined,
        subjectId: undefined,
        subjectParentId: undefined,
        title: undefined,
        price: undefined,
        lessonNum: undefined,
        cover: undefined,
        buyCount: undefined,
        viewCount: undefined,
        version: undefined,
        status: undefined,
        delFlag: undefined,
        createTime: undefined,
        createBy: undefined,
        updateTime: undefined,
        updateBy: undefined
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length!==1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加课程";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.loading = true;
      this.reset();
      const id = row.id || this.ids
      getCourse(id).then(response => {
        this.loading = false;
        this.form = response.data;
        this.open = true;
        this.title = "修改课程";
      });
      getSubjectChildren(row.subjectParentId).then(response => {


        this.childrenList=response.data

      });

    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          this.buttonLoading = true;
          if (this.form.id != null) {
            updateCourse(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            }).finally(() => {
              this.buttonLoading = false;
            });
          } else {
            addCourse(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            }).finally(() => {
              this.buttonLoading = false;
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids;
      this.$modal.confirm('是否确认删除课程编号为"' + ids + '"的数据项？').then(() => {
        this.loading = true;
        return delCourse(ids);
      }).then(() => {
        this.loading = false;
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).finally(() => {
        this.loading = false;
      });
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('edu/course/export', {
        ...this.queryParams
      }, `course_${new Date().getTime()}.xlsx`)
    }
  }
};
</script>
